package netty.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
import io.netty.handler.timeout.IdleStateHandler;
import lombok.extern.slf4j.Slf4j;

@Slf4j
public class UpTimeClient {
    static final boolean SSL = System.getProperty("ssl") != null;
    static final String HOST = System.getProperty("host", "127.0.0.1");

    static final int PORT = Integer.parseInt(System.getProperty("port", "8009"));
    static final int SIZE = Integer.parseInt(System.getProperty("size", "256"));

    static final int RECONNECT_DELAY = Integer.parseInt(System.getProperty("reconnectDelay", "5"));
    private static final int READ_TIMEOUT = Integer.parseInt(System.getProperty("readTimeout", "10"));

    public static void main(String[] args) throws Exception {

        UpTimeClient client = new UpTimeClient();
        client.connect();

        // Wait until the connection is closed.
//        f.channel().closeFuture().sync();
//
//        try {
//        } finally {
//            group.shutdownGracefully();
//        }
    }

    private final Bootstrap b;

    public UpTimeClient() throws Exception {
        // Configure SSL.
        final SslContext sslCtx;
        if (SSL) {
            sslCtx = SslContextBuilder.forClient()
                    .trustManager(InsecureTrustManagerFactory.INSTANCE).build();
        } else {
            sslCtx = null;
        }

        EventLoopGroup group = new NioEventLoopGroup();
        b = new Bootstrap();
        b.group(group)
                .channel(NioSocketChannel.class)
                .remoteAddress(HOST, PORT)
                .handler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    protected void initChannel(SocketChannel ch) throws Exception {
                        ChannelPipeline p = ch.pipeline();
                        if (sslCtx != null) {
                            p.addLast(sslCtx.newHandler(ch.alloc(), HOST, PORT));
                        }
                        p.addLast(
                                new IdleStateHandler(READ_TIMEOUT, 0, 0),
                                new UpTimeClientHandler(UpTimeClient.this)
                        );
                    }
                });
    }

    public void connect() {
        // Make the connection attempt.
        // ChannelFuture f = b.connect(HOST, PORT).sync();
        b.connect().addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture channelFuture) throws Exception {
                if (channelFuture.cause() != null) {
                    log.info("Failed to connect: " + channelFuture.cause());
                }
            }
        });
        log.info("connect to {}:{}", HOST, PORT);
    }
}
